Board-feeding device for resaws



Dec. 4 1923.

C. JOHNSON BOARD FEEDING DEVICE FOR RESAWS Filevd April 5, 1.922 2 Sheets-Sheet 1 W S M rile.. l I I I n ,MM j f CVE \u\./, K. u* 1 @u Y MM. uw O NX mm. Nm. M my? WW bmw. QQ mv Y ummm l|| hm. ,www .r\ n l /l f l @w M \4!.! .MHMHIIHM m l dw @l/MM wr QmY/ Kw r w /l xH l, Il I@ o o k\ MY hm mw KW QN JQ v s S Y v 7. \Q uw 7,. K m 4,. 1. s .Ill In.. F. I.|| //N\\r l' h @N Rmw Filed April 5I C JOHNSON BOARD FEEDING DEVICE FOR REsAws Patented Dec. 4, 1923.4 l

CHARLES JOHNSON, F MINNEAPOLIS, MINNESOTA..

BOARD-FEEDING DEVICE Fon ansnws.

Appneatmn mea prix s, 1922. serial NQ. 1549368.` l i To all whom t may concern.'

Be it known that I, CHARLnsJoHNsoN, a citizen of the United States residing at Minneapolis,l in the county of ennepin andA VState of Minnesota, have invented certain new and useful Im roveinents in 4Board-l Feeding Devices for ws; and I do hereby declare the following to be a full, clear, and exact description of the invention, `sjuch y -rear and front Lends projecting. The front as will enable others skilled in the art to which it appertainsltomake Aand use they*v same.

My present invention provides an extremely lsimple, land 'highly efiicient boardfeeding device especially adapted for use in connection with .vertical resaws of the type wherein the boards are directly fed to the band saw by co-operating upright feed rollers.Y A f 2c In my improved board-feedin device, the boards to be. resawed are place on a table and, by the action of feed, rollers having spiral feeding surfaces, arefed against an` oblique deiiector and are delivered one at s. time to a feed belt or chain, by which latter the boards are delivered to the upright feed rollers-and thence to the saw. This arrangement makes it possible to place the boards quite carelessl on the feed table and the feed device wi aright and select and pro erly deliver the boards, one at a time, to t e l resaw. z

In the accompanying drawings, Vwhich illustrate the invention, like characters indicate like parts throu houtthe several views.

Referring to the rawings: v Fig. 1 is a side elevation showing the improved board-feeding device in position for delivery to a vertical resaw, parts only of the latter being indicated by dotted lines;

Figf2 is a plan view of the parts shown in Fig. 1, portions bein broken away;

Fig. 3 is a front end e evation of the feedi indevice, some parts being broken away; v

ig. 4 is a detail in-horizontal section on the line 5 4 of Fig. 3; and i. Fig. 5 is a fragmentary horizontal section on the line 5-5 of Fig. 3.

Of the partsof the vertical re'saw, it is only desirable for the purposes of this case to particularly note the frame 6, the u right feed rollers 7 and the band saw 8, sai parts being of well known construction, such, for example, as that found in the commercially well known resaw manufactured by the 'i Mereen-Johnson Machine Company, 'of

Minneapolis,"Minnesota.

The board-receiving table 10 of the boardfeeding device is shown as supported by a leg structure 11., `The numeral 13 indicates a horizontal guide "rail or beam that is rigldly secured to the leg,v structure 11 and table 10 with its upper surface fiushwith the upper surface of the latter but with both end of said guide rail 13 is'shown as transversely reduced in width and extended under the lower ends of the (io-operating -laterally spaced upright feed rollers 7vof the resawgV This raily 13, lfrom its rear end to the ,front edge of the table 6, is formed with a channel in which Works a link belt or sprocket chain 14 that runs over guide 'sprockets'y 1 5 and 16. The sprocket 15 works in the bifurcated rear end of the rail 13 and is journaled thereto by a short shaft 17, while the sprocket 16 is located at the front end of the feed'table and is secured to la short countershaft 18 journaled in the rail 13 and provided at its 4outer end with a driving sprocket4 19. .Cer-

tain of the links of the feed belt 14, at suitably spaced distances, apart, are provided with board-feeding lugs 20, which, as they move fromthe rear sprocket 15 to the front sprocket 16, project above the upper surface of the rail so'that they will engage and feed forward aboard delivered onto the feed belt. By reference to Fig. 1, it will be noted that the sprocket 16 is set lower than the sprocket 15 and that the channel of the rail 13, at itsl front extremity, has a downwardly curved surface at 138L that causes' the lugs of the feed belt to lower out lof engagement with the board after the board has been forced between the yfeed rollers 7.

Secured on the table top 10, at ther delivery end thereof,is an oblique deecting bar 21 that is made endwise adjustable by slot and screw connections 22. 4Secured on the outer side of the rail 13, parallel to the feed belt 14, is a flanged uide plate 23 that is made laterally adJusta leby slot and screw connections 24. The front or inner end of the deilecting bar 21 is spaced from the guide plate 23V only far enoughvto permit one board at altime to be passed between the same by the feed belt and, of course, thead'ustments of the said guide plate andbar ma e it possible to set the same forY boards of different thickness. i

The boards y are placed edgewise on the table y10 and will assume positions substantially as indicated by dotted lines in Fig. 2. Said. table l() is provided with a plurality of transverse slots through which the upper surfaces of feed rollers 25 project slightly above the upper surface of said table. These feed rollers are provided with spiral threads or corrugations, for an important purpose which will presently appear. The shafts of said rollers are journaled in suitable bearings on the under side of the table 10 and in the rail 13 and, at the rear of the machine, are provided with sprockets 26 over whichl runs a sprocket chain 27. The sprocket chain 27 also runs under idle guide sprockets 28 journaled to the side of the rail 13. Thus, the several feed rollers 25 are rotated in the same direction, Vto Wit: in a direction to move the boards y forward againstthe oblique deflecting bar 21 and to cause the threads of said rollers to Work the boardslaterally-toward the feed belt 14 and guide board 23. .Of course, the oblique de-v flectingboard 21 cooperates with the threads on the feed rollers to produce the above noted Alateral movement of the boards and to press the same, one after the other, to the ieed belt. The vshaft of the front' feed roller 25, outwardlof its sprocket 26, is rovided With another sprocket 29. A sproc et chain 30 runs over the sprocket 29 and over a sprocketl, which, as shown, is secured by screws 32 to a hub 33 carried by the rear end of a shaft 34 journaled in suitable bearings on the leg structure 11 and provided vwith a stepped cone pulley 35.

The numeral 36 indicates an annular ysprocket that is carried by the -hub- 33 and is frictionally clamped between the web of the sprocket 31 and an outstanding flange of the hub 33, (see particularly Fig. 4 A sprocket chain 37 runs over the sproc et 36 and thesprocket 19 on the rear end of theI ,feed belt driving shaft'f18; j By post he above means, the rollers 25 lare itively driven from the shaft 34,'but the feed belt 14 is frictionally driven from said shaft. This frictional or slipping connection makes it feasible to normally drive the feed belt 14 at a speed slightly in excess of the peripheral speed of the feed rollers 7 and so that the boards will 'be pressed end- Wise, one against the other, and fed to the saw 'as a continuous line of lumber. The feed rollers 7 will actuall control the speed of delivery of the boar s to the sawv and when the hold back one board against that being de ivered'by the feed belt 14, the sprocket 36 will be caused to slip in respect to the hub 33.

In the arrangement illustrated, the coun -tershat 34 is driven through a belt 38 that runs over t-he stepped cone pulley 35 and over a reversely stepped cone pulley 39 carried by a lower countershaft 40. This countershaft 40 is journaled in bearings 41 mounted for vertical movements ixrguides 42 on the leg structure 11 so that the ten@ sion on the belt 38 may be varied and the slack thereof alwaysl vtaken up. The bearings 41, as shown, are arranged to be vertically adjusted by a lever 43 secured to the front end of a rock shaft 44 journaled in suitable bearings 45 on the leg structure 11 and having short arms 46 connected to said bearings by short links 47. The lever 43 is of the power-driven shafts 52, preferab y the feed shaft, of the vertical resaw. v

jThe operation of the board-feeding device illustrated is obvious from the foregoing de scription. The eiciency Aofv the same h'as been thoroughly demonstrated in practicefj-;

What -I vclaim is zv 1. A board-feeding device 'comprising a:

table, a feed device movable longitudinally; i i' 5- of said table, and a deliecting 'bar obliquely secured to said table -in a sltion divergin from the receiving portlon of said fee device and terminating immediately ad i only the board jacent to said device, whereby carried by said crowded onto said' device an device may be fed beyondsaid deflectin'g bar;A

2. A -board-feeding device comprising atable, a feedY Ibelt movable longitudinally of said table, a -deflecting bar ob iquely se.

cured to said table in avposition'dlvergin' from the receiving portion of said fee "belt and terminating immediately adjacent g to said belt, whereby only the board `crowded -V onto said belt and carried by said belt may be fed beyond saidd'eecting bar, andv means the board delivered thereto from crowded laterally off from the same.

3. A board-feeding ldevice com rising a' i 4. A board-feeding device com rising a` table, a feed belt movable longitu inally of said table, a deecting bar obliquely secured los l no Aassociated with said belt for preventing 'f :temete i to said table in a position diverging from the receiving portion of said feed belt and terminating immediately adjacent to said belt, whereby only the boardcrowded onto said belt and carried vby said belt may v be fed beyond said deliecting bar, and spiral feed rollers associated with said table and driven in a direction to crowd the boards laterally toward said feed belt.

5. A board-feeding device com rising a table, a Jfeed belt movable longitu inally of said table, a dellecting bar obliquely secured to said table in a position'diverging from the receiving portion of said feed belt and terminating immediately adjacent to said belt, whereby only the board crowded onto said belt and carried by Said belt may be fed beyond said dellecting bar, a guide rail secured adjacent and parallel to said feed' device on the side thereof opposite to said delecting bar and operating to prevent a board delivered to said feed belt from being crowded laterally off from the same, and

table and driven in a direction to crowd the boards laterally toward said feed belt and against said guide rail.

6. A boardffeeding device comprising a table, a feed belt movable longitudinally of said table, a delecting bar obliquely secured to said table in a position diverging from the receiving portion of said feed belt and terL minating immediately adjacent to said belt7 whereby only the`boad crowded onto said belt and carried by said belt may be fed beyond said delecting bar, and means associated with said belt for preventing the board delivered thereto from being crowded laterally olf' from the same, and which deilecting bar is arranged' to hold a plurality of boards in compact arrangement set edge- Wise in vertical planes on said table and to giver the same one et a time to said feed In testimony whereof l aix m si ature. 

